Disclaimer: I am not an eventer, but I do know Dressage and have been to a few shows.
Originally Posted by Moonshadow16
She might be. That would explain a lot, leave it to me to not think of the obvious... hahaha.
When you are in the warm up ring, there are typically other horses there right?
When you are showing, you are typically alone, yes? So maybe it's just a case of she needs to get used to that. Is there a way you could arrive really early and practice in the show ring with her?